title: Nonlinear compression to sub-30-fs, 0.5 mJ pulses at 135 W of average power.
abstract: Incorporation of coherent combination into a state-of-the-art fiber-chirped pulse amplification system obtains 1.1 mJ, 340 fs pulses with up to 280 W of average power at 250 kHz repetition rate. Propagation of this laser pulse inside a krypton-filled hollow-core fiber results in significant spectral broadening. Chirped mirrors are used to compress the pulses to 26 fs, 540 μJ (135 W) leading to a peak power of more than 11 GW. This unprecedented combination of high peak and average power ultrashort pulses opens up new possibilities in multidimensional surface science and coherent soft x-ray generation.
authors.forename: Steffen
authors.initials: S
authors.lastname: Hädrich
authors.forename: Arno
authors.initials: A
authors.lastname: Klenke
authors.forename: Armin
authors.initials: A
authors.lastname: Hoffmann
authors.forename: Tino
authors.initials: T
authors.lastname: Eidam
authors.forename: Thomas
authors.initials: T
authors.lastname: Gottschall
authors.forename: Jan
authors.initials: J
authors.lastname: Rothhardt
authors.forename: Jens
authors.initials: J
authors.lastname: Limpert
authors.forename: Andreas
authors.initials: A
authors.lastname: Tünnermann